SG6902 Fairchild Semiconductor, SG6902 Datasheet - Page 8

• Manufacturer Part Number: SG6902
• Description: Green-Mode PFC / Flyback-PWM Controller
• Manufacturer: Fairchild Semiconductor

www.DataSheet4U.com
Green-Mode PFC / Flyback-PWM Controller
PWM STAGE
FBPWM
Symbol
A
Z
I
FB
T
V
V
T
V
V
V
V
V
S
V
*
PWM-Current Sense
Symbol
T
V
V
T
△V
PWM Output Driver
Symbol
V
V
V
T
T
DC
© System General Corp.
Version 1.3.1 (IAO33.0022.B3)
FB
FB
OPEN-PWM
PFC-OFF
PD-PWM
BNK-PWM
R-PWM
F-PWM
v-PWM
PFC-OFF1
PFC-OFF2
PFC-ON 1.6
PFC-ON 2.85
PFC-ON 0.8
PFC-ON 1.95
N
G
G
Not tested in production.
LIMIT-1
LIMIT-2
Z-PWM
OL-PWM
OH-PWM
*1
OPEN-LOOP
*
MAX-PWM
SLOPE
Parameter
Propagation Delay to Output
Peak Current Limit Threshold Voltage1
Peak Current Limit Threshold Voltage2
Leading-Edge Blanking Time
Slope Compensation
Parameter
Output Voltage Maximum (Clamp)
Output Voltage Low
Output Voltage High
Rising Time
Falling Time
Maximum Duty Cycle
Parameter
FB to Current Comparator Attenuation
Input Impedance
Maximum Source Current
PWM Open-Loop Protection Threshold
PWM Open-Loop Protection Delay Time
PFC Off Voltage at FBPWM
PFC Off Voltage at FBPWM
PFC Off Delay Time
PFC On Voltage at FBPWM
PFC On Voltage at FBPWM
PFC On Voltage at FBPWM
PFC On Voltage at FBPWM
Frequency Reduction Threshold on
FBPWM
Green-Mode Modulation Slope
Voltage on FBPWM at F
S
=20KHz
Test Conditions
RANGE=Open
RANGE=Ground
△V
△V
Added to Current Sense
Test Conditions
V
V
V
V
9V
V
2V
Test Conditions
R
RANGE=Ground
RANGE=Open
R
RANGE=Ground V
RANGE=Ground V
RANGE=Open V
RANGE=Open V
RANGE=Ground
- 8 -
DD=
DD=
DD=
DD=
DD=
I
I
=24kΩ
=24kΩ
S
S
20V
15V; I
13V; I
15V; C
15V; C
=△V
: Compensation Voltage
SLOPE
O
O
=100mA
=100mA
L=
L=
5nF; OPWM=2V to
5nF; OPWM=9V to
x (T
RMS
RMS
RMS
RMS
on
=0.8V
=1.95V
/T)
=1.6V
=2.85V
www.sg.com.tw • www.fairchildsemi.com
0.65
0.60
Min.
2.5
4
0.8
4.2
45
1.9
60
1.35
Min.
60
270
0.45
Min.
8
30
30
73
500
Typ.
3.1
5
1.2
4.5
56
V
V
650
V
V
V
V
V
V
V
2.1
75
1.60
Typ.
0.70
0.65
350
0.50
Typ.
16
60
50
78
Product Specification
G
G
G
G
G
G
+0.2V
+0.2V
+0.35
+0.35
+0.85
+0.5V
Max.
1.5
90
Max.
120
0.75
0.70
450
0.55
Max.
3.5
7
4.8
70
2.3
1.75
18
1.5
120
110
83
September, 2007
800
SG6902
Unit
ns
V
V
ns
V
Unit
V/V
KΩ
mA
V
ms
V
V
ms
V
V
V
V
V
Hz/V
V
Unit
V
V
V
ns
ns
%